The Izumi we Used to love(232spoiler)

Whats up with Izumi jumping into some vampires sword? What happened to the cold hearted Izumi that massacred 400 people with guns? Why did you have to go all soft on us? I prefered a cold hearted Izumi. He dissapointed me in 232.

And i looked, and behold, an ashen horse; and he who sat on it had the name Death and hades was following with him.
Revalations 6:8

I never loved Izumi. I actually hate him. Yeah, I always hated him, now that I think about it. Go soft? We are talking about Vamps, they are not mere humans. But I think Izumi will come back in no time. Afterall, he's probably the strongest of the team.

I believe he just had an incredible desire to get back into Gantz so he just went psycho. Once he got in he was still psycho but less so because he achieved his main goal. Maybe he saved his gf cause he actually cared for her? o.O